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IS 11691 (1986): Power Thresher, Spike Tooth Type [FAD 21: 
Farm Implements and Machinery] 




Jawaharlal Nehru 
'Step Out From the Old to the New" 



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PROTECTED BY COPYRIGHT 



IS : 11691 - isee 

(Reaffirmed 1997) 

Indian Standard 

SPECIFICATION FOR 
POWER THRESHER. SPIKE TOOTH TYPE 



UDC 63l-361-2-022"96-83 




© Copyright 1986 

INDIAN STANDARDS INSTITUTION 

MANAK BHAVAN, 9 HAHADUR SHAff ZAFAR MARG 

NEW DELKt nu[IQ2 

Cr 2 NoBfmbET 1906 



IS : 11691 - 1986 

Indian Standard 

SPECIFICATION FOR 
POWER THRESHER, SPIKE TOOTH TYPE 

Harvesting and Threshing Equipment Sectional Committee, AFDC 51 

Chairman Representing 

Dr S. R. Vbbma Punjab Agricultural University, Ludhiana 

Members 

Vr L, N. Shttkla { Alternate to 
Dr S. R. Verma ) 
Shri M. R. Ahlaba Rao Vicon Limited, Bangalore 

Shrt Bhupendra National Agricultural Cooperative Marketing 

Federation of India Ltd, Delhi 
Shri B. B. Nayyar ( Alternate ) 
Shri Chandra Mohan Punjab Tractors Limited, Ropar 

Shri G. S. Rihai* ( Alternate ) 
Chief Engineer Haryana Agro-Industries Corporation Ltd, 

Chandigarh 
Shri M. M. Kohli ( Alternate ) 
Shri Kartar SiKoh Dev Standard Agriculture Engineering Company, 

Ludhiana 
Shri N. K. Dhand ( Alternate ) 
Shri N. D. Dhiman Vishiv Karma Foundry ( Regd ), Phillaur 

Shri V. K. Dhiman ( Alternate ) 
Director Central Farm Machinery Training & Testing 

Institute ( Ministry of Agriculture ), Budni 
Senior Test Engineer ( Alternate ) 
Director Northern Region Farm Machinery Training & 

Testing Institute ( Ministry of Agriculture )j 
Hissar 
Senior Test Enginker ( Alternate ) 
Shri R. C. Goel Department of Agriculture, Government of Uttar 

Pradesh, Lucknow 
Shri GhaNdrashekhar Sharma ( Alternate ) 
Shri J. P. Gupta Department of Industries, Government of Punjab, 

Chandigarh 
Shri Harbhajan Singh ( Alternate ) 
Shri R. K. Gupta State Farms Corporation of India Ltd, New Delhi 

Shri M. L. Garg ( Alternate ) 
Shri J. S. Hara In personal capacity ( Village Kanganwal, P,0. Jogiano, 

Ludhiana ) 
Shri Inderjit Singh Union Forgings, Ludhiana 

Shri ParaMjit Singh ( Alternate ) 

( Continued on page 2 ) 



© Copyright 1986 

INDIAN STANDARDS INSTITUTION 

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and 
reproduction in whole or in part by any means except with written permission of the 
publisher shall be deemed to be an infringement of copyright under the said Act. 



IS : 11691 - 1986 

( Continued from page 1 ) 

Members Representing 

Shri Jaodtsh Chandbb Union Tractor Workshop, New Delhi 

Shri V. P. S. Kashyap Department of Agriculture, Government of Haryana, 

Chandigarh 
Shri A. L. Mittal Federation of Industrial Association, Moga 

Dr K. N, Nag Sukhadia University, Udaipur 

Db T. p. Ojha Central Institute of Agricultural Engineering 

( IGAR ), Bhopal 
Dr R. S. Devnant ( Alternate ) 
Db J. S. Panm^ab Indian Agricultural Research Institute ( ICAR ), 

New Delhi 
Shri K. K. Kaul ( Alternate ) 
Db K. M. Patbl Jyoti Limited, Vadodara 

Shbi N. C. Patel ( Alternate ) 
Shbi E. C. Peter Gujarat Agro-Industries Corporation Limited, 

Ahmadabad 
Shri Gurmit Singh Sehmbey Jodhsingh Sehmbey & Sons, Goraya 

Shbi Sanjeev Kximab ( Alternate ) 
Shbi V. K. Singh ESPI ( New Delhi ) Trading Company, New Delhi 

Shri R. B. L. Srivastava U.P. State Agro-Industrial Corporation Limited, 

Lucknow 
Shbi S. N. Srivastava Ministry of Agriculture ( Department of Agriculture 

& Co-operation ), New Delhi 
Shbi V. Surayanarayanan Escorts Limited, Faridabad 

Shbi V. K. Singh { Alternate ) 
Db T. C. Thakur Govind Ballabh Pant University of Agriculture & 

Technology, Pantnagar 
Shri B. P. VabshKey ( Alternate ) 
Shbi T. Purnanandam, Director General, ISI ( Ex-qfficio Member ) 

Director ( Agri & Food ) 

Secretary 

Shbi K. Anbabasxt 
Assistant Director ( Agri & Food ), ISI 



IS : 11691 * 1986 

Indian Standard 

SPECIFICATION FOR 
POWER THRESHER, SPIKE TOOTH TYPE 

0. FOREWORD 

0.1 This Indian Standard was adopted by the Indian Standards 
Institution on 28 April 1986, after the draft finalized by the Harvesting 
and Threshing Equipment Sectional Committee had been approved by 
the Agricultural and Food Products Division Council. 

0.2 Manufacture and use of power thresher, spike tooth type, has 
increased in the country for threshing of crops such as wheat, jowar, 
pulses, etc, except paddy. A need was, therefore, felt for the preparation 
of an Indian Standard on this equipment to provide guidelines for per- 
formance, constructional and safety aspects of this thresher. 

0.3 In the preparation of this standard, assistance has been derived from 
the Punjab Agricultural University, Ludhiana. In this standard the per- 
formance requirement for threshing of wheat crop are only given. It is 
indented to include performance requirements for threshing of other 
crops as and when the data becomes available. 

0.4 The figure given in the standard is only for illustration and should 
not be considered as suggestive of any standard design. 

0.5 For the purpose of deciding whether a particular requirement of 
this standard is complied with, the final value, observed or calculated, 
expressing the result of a test or analysis, shall be rounded off in accor* 
dance with IS : 2-1960*. The number of significant places retained in 
the rounded off value should be the same as that of the specified value 
in this standard. 



1, SCOPE 



1.1 This standard prescribes the material, constructional, performance 
and other requirements of power thresher, spike tooth type. 

Note — Power threshers, spike tooth type are used for threshing crops, such as 
wheat, jowar and pulses except paddy* 



♦Rules for rounding off numerical values ( revised ). 

3 



IS : 11691 - 1986 

2. TERMINOLOGY 

2.1 For the purpose of this standard the definitions given in IS : 6284- 
1985* shall apply. 

3. MATERIALS 

3.1 The materials used for various parts ( see Fig. 1 ) shall be as given 
in col 3 of Table 1. The material may conform to Indian Standards 
given in col 4 of Table 1. The material for the components shall be 
declared by the manufacturer. 

4. CONSTRUCTION 

4.1 Frame — The construction of the frame shall be rigid and strong, 

4.2 Transport Wheel — The minimum diameter of the wheel shall 
be 350 mm and its minimum width shall be 60 mm. 

4.3 Threshing Cylinder Cover — Projecting portion of cylinder cover 
shall be rigidly fixed preferably by using rivets laterally and radially. 

4.4 Spikes — Spikes shall be braced or rigidly fixed to the cylinder 
depending upon whether round rods or unthreaded square bars are used. 
Whenever spikes are attached to the cylinder by means of fasteners, spring 
washer shall be used. 

4.5 Feeding Systems — Feeding systems in the thresher shall be of 
chute or hopper or conveyor. The requirement of the feeding system 
used in the thresher shall be as given in IS : 9129-1979t. 

4.6 Blower — The blower may be of aspirator type. 

4.7 Sieves — At least two sieves shall be used. Sieves shall be of easily 
cleanable and replaceable. 

4.8 Shaker — The crank may be mounted on shaft and it shall be 
adjustable. 

5. PERFORMANCE REQUIREMENTS 

5.1 When tested in accordance with the method given in 7.1 of IS : 6284- 

1985*, the power required at no-load shall be not more than 30 percent 
of the rated power of the thresher. 



♦Test code for power thresher for cereals ( second revision ). 

tSpecification for technical requirements for safe feeding systems for power 
threshers. 



CYUNDEft 



cn 



THRESHING 

CYLINDER 

COVER 




-CYLINDER 
HOUSING 



BLOWER 

HOUSING 



MAIN 
SHAFl 



FEEDING CHUTE 
CONCAVE 



FLY WHEEL- 
DEFLECTORS- 



- ASPIRATOR 
BLOWER 

-FLAT 
PULLEY 



;:::r-siEVE rocking 

MECHANISM 



SIEVES 




TRANSPORT 
WHEELS - 

Fig. 1 Specification for Power Thresher, Spike Tooth Type 



CO 






to 



IS : 11691 - 1986 



TABLE 1 



Sl 
No 


Name of Part 


(1) 


(2) 


i) 
ii) 
in) 
iv) 

Vl) 


Frame 

Shaft 

Concave 

Threshmg cylinder cover 

Blower 

Sieve 


vii) 


Fly wheel 


viii) 


Pulley 


ix) 


Brackets 


x^ 


Transport wheel 


xi) 


Spike 



MATERIALS USED FOR VARIOUS PARTS OF POWER 
THRESHER, SPIKE TOOTH TYPE 

{ Clause 3.\ ) 

Material 



{ 



xii) Threshing cylinder 



L 



(3) 



Mild Steel 



Cast iron 
Cast iron 
Mild steel 



Cast iron 
Mild steel 

Rubber 
Carbon steel 
Mild steel 

Mild steel 

Cast steel 
Cast iron 



Ref to Indian 

Standard 

(4) 



IS 
IS 



IS; 

IS : 

IS: 
IS: 

IS 
IS; 

IS: 
IS: 
IS: 



226-1975* 
1977-1975t 



210-1978J: 

:2I0-1978t 

226-1975* 
: 1977-I975t 

:210-I978t 
226-1975* 

1977-1975t 
2591-1969§ 
226-1975* 



226-1975* 
1977-19751 

IS: 9731-19801! 

IS : 210-I978t 



IS 
IS 



♦Specification for structural steel ( standard quality ) {fifth revision ). 
tSpecification for structural steel ( ordinary quality ) ( second revision ). 
tSpecification for grey iron castings ( third revision ). 

§Dimensions for hot rolled steel bars for threaded components ( second revision ). 
ilSpecification for steel castings for general engineering purposes. 



S.l^l During the no-load run, the following observations shall not 
occur. 

a) Presence of any marked oscillation during operation, 

b) Presence of undue knocking or rattling sound, 

c) Frequent slippage of belts, 

d) Non-smooth running of shafts in their respective bearings, 

e) Any marked unusual wear or slackness in any components, 

f ) Any marked rise in bearing temperature, 

g) Vibration in blower running, and 

h) Any development of crack in welded or fabricated components. 



IS : 11691 - 1986 

5»2 When tested in accordance with the method given in 8,1 of IS : 6284- 
1985*, the thresher shall meet the following requirements for wheat crop. 

a) The optimum input capacity shall be not less than 85 kg of 
wheat crop per kWh of energy consumed, 

b) The threshing efficiency shall be not less than 99 percent, 

c) The cleaning efficiency shall be not less than 98 percent, and 

d) The total losses shall not exceed 3 percent. The total cracked 
grain shall be not more than 2 percent. 

5.2,1 During and after the test for 5.2, the following visual observations 
shall not occur: 

a) Observations given in 5. 1.1, 

b) Frequent clogging of threshing unit, 

c) Frequent clogging of sieve apertures, 

d) Non-smooth flowing of material through different components, 

e) Frequent clogging of grain in elevator unit, and 

f ) Frequent loosening of fasteners. 

5,3 When tested in accordance with 8.2 of IS : 6284-1985* no break- 
downs shall occur in the working components like feeding unit, threshing 
unit, cleaning unit, elevating unit, body, etc. 

6, OTHER REQUIREMENTS 

6.1 The thresher shall meet the requirements given in 4 ( except 4.17 ) 
and 5 of IS : 9020-1979t. 

7. MARKING AND PACKING 

7*1 Marking — Marking on the threshers shall be done in accordance 
with IS : 10618-1983J and 7*1 and 7.2 of IS : 9020-1979t. 

7.1.1 Power thresher may also be marked with the ISI Certification 
Mark. 

Note — The use of the ISI Certification Mark is governed by the provisions of the 
Indian Standards Institution ( Certification Marks ) Act, and the Rules and Regu- 
lations made thereunder. The ISI Mark on products covered by an Indian Standard 
conveys the assurance that they have been produced to comply with the require- 
ments of that standard under a well-defined system of inspection, testing and quality 
control which is devised and supervised by ISI and operated by the producer* ISI 
marked products are also continuously checked by ISI for conformity to that 
standard as a further safeguard. Details of conditions under which a licence for the 
use of the ISI Certification Mark may be granted to manufacturers or processors, 
may be obtained from the Indian Standards Institution, 

♦Test code for power thresher for cereals ( second revision ). 

fGeneral and safety requirements for power threshers. 

tPictorial representation for cautionary notices for power threshers. 

7 



IS : 11691 - 1986 

7.2 Packing — The packing of the power thresher or its different 
assemblies shall be done in accordance with the agreement between the 
purchaser and the supplier. 

8. SAMPLING AND TESTS 

8.1 At least one thresher of a production model of each power rating 
shall be tested under type testing for all the requirements of this speci- 
fication. 

8.2 Each thresher shall be tested under routine testing for the following: 

a) Requirements given under 5.1, 5.1.1 and 7.1, 

b) Dimensional measurements of the characteristics given under 4 
to 14 of Appendix A of IS : 6284-1985* and comparing the 
values with those which were obtained for the thresher, type 
tested. 

8.3 Unless otherwise agreed to between the purchaser and the supplier, 
the sampling of power threshers for lot acceptance shall be done in 
accordance with 3 of IS : 7201-19741. 



♦Test code for power thresher for cereals ( second revision ). 
fMethods for sampling of agricultural machinery and tractors.